Headphone output specifications?

Hello,

What are the headphone output specifications or ratings for the Media Speakers? Also are the listed specifications (http://www.audyssey.com/products/media-speakers/specs) such as Audyssey EQ, Audyssey BassXT, and Audyssey Dynamic EQ being applied through the headphone output?

Lastly is it safe to turn off and on the speakers with headphones plugged in?